Super Duplex Stainless Steel 2507 ASTM A790 UNS S32750 / 1.4410 Seamless Pipes
ASTM A790 / ASME SA790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes
A790 S32750 pipes refer to pipes made from the duplex stainless steel grade S32750, which is also known as 2507 stainless steel. These pipes are highly resistant to corrosion and have excellent mechanical properties, making them ideal for use in harsh environments such as offshore oil and gas platforms, chemical processing and marine engineering.
What are the characteristics of Duplex 2507 / UNS S32750?
- High resistance to chloride stress corrosion cracking
- High Strength
- Superior resistance to chloride pitting and crevice corrosion
- Good general corrosion resistance
- Suggested for applications up to 600° F
- Low rate of thermal expansion
- Combination of properties given by austenitic and ferritic structure
- Good weldability and workability
ASTM A790 / ASME SA790 S32750 Super Duplex Stainless Steel Specification
| Standard | ASTM A790, ASME SA790 |
| Equivalent Standards | DIN 17458, GOST 9941-81, GOST 9940-81, EN 10216-5, ASTM A790, ASME SA790, DIN 17456 |
| Material | UNS S32750 |
| Equivalent Materials | X2CrNiMoN25-7-4, 1.4410, SAF2507, F53 |
| Related Products | stainless steel tube, stainless steel pipe, heat exchanger steel tube |
Chemical Composition
| Grade |
C max |
Si max |
Mn max |
P max |
S max |
Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Some of the quality tests carried out by us includes
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Applications
A790 S32750 pipes have a wide range of applications due to their excellent corrosion resistance and mechanical properties. Some of the common applications of these pipes include:
- Offshore oil and gas platforms
- Chemical processing plants
- Desalination plants
- Water treatment plants
- Pulp and paper industry
- Heat exchangers
- Power generation plants
- Marine engineering
- Food processing industry
- Pharmaceutical industry
These pipes are also used in various other industries where resistance to corrosion and high strength are required.
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